The source (etymology) of the phrase is a play on words: * "grass roots" support is an 'authentic' community response on an issue * AstroTurf® is an artificia

The source (etymology) of the phrase is a play on words: * "grass roots" support is an 'authentic' community response on an issue * AstroTurf® is an artificial playing surface used in some sports facilities (especially indoor ones), instead of a one made from real grass So "astroturfing" is the creation of an 'artificial community response'.